Improvement in balance-spring hooks



E. BLACKMAN. BALANCE-SPRING BOOK. 1 No. 192,812. 4 Paten'tqd July 10,1877."

N PETERS. PHOTQLITHOGRAFHEH, WASHINGTONv D. O.

UNITED STATES PATENT OFFICE.

EBENEZEB BLAOKMAN, OF NEW YORK, N. Y.

IMPROVEMENT IN BALANCE-SPRING HOOKS.

Specification forming part of Letters Patent No. 192,8] 2, dated July 10, 1877; application filed November 3, 1876.

To all whom it may concern Be it known that I, EBENEZER BLAGKMAN, of the city, county, and State of New York, have invented a certain new and useful Improvement in Balance'Spring Hooks; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Figure l is a side view. Fig. 2 is a side view in section.

The object of my invention is to produce a balancespring hook for suspending chandeliers, pendants, lamps, bird-cages, flower-baskets, 8th., which is simple and easily adjusted, and cheaply constructed, doing away with the cams, ratchets, levers, and frictions usually applied to such fixtures, and one that is not liable to get out of order. I y

I construct my spring-hook of metal, and in the usual form of such fixtures, with a frame and incased spring, and with a metal ribbon coiling around the outside of the casing of the spring, in the usual manner. I also construct a metal piece or band, A, Fig. 2, of yielding or spring metal, which I attach to the frame, as shown at B, Fig. 2, which is made adjustable by shifting to the different pin-holes, as shown at 0, Figs. 1 and 2. This band of metal passes partly around the outside of the casing of the spring and ribbon, and rests upon the outer rim or edge, as shown at D, Figs. 1 and 2. The said band of metal has an eye or opening in the top, for the purpose of passing a pin through it to secure it to the frame, as shown at E, Fig. 1. .Near the bottom. in this band is a slot wide enough to allow the metal ribbon to pass through the band, as shown at F, Fig. 2. Below the slot in the band is a'roller to relieve the friction on the metal ribbon, as shown at G, Fig. 2.

I also construct my brake band of still metal, and allow the band to extend outward and up beyond the eyethat attaches it to the frame; and I form an eye in the end of the the spring-hook by the eye in the top of the frame or brake band, and attach whatever article you wish to suspend to the hook in the bottom of the ribbon. The greater weight you suspend the greater will be the friction.

To relieve the friction, raise up on the article suspended.

.The advantage of this fixture is thatit can be cheaply constructed, as a much smaller spring can be used in it than is used in other kinds, thereby oheapening the article.

Having thus fully described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-- 1. A balance-spring hook held in position by a friction band or brake, acting by the weight of the article suspended on the outer rim or edge of thecasing holding the spirallywound spring and ribbon, as described.

2. A friction band or brake having an adjustable fulcrum-point, in combination with a balance-spring hook supported by a spirallywound spring and ribbon, all arranged and operated substantially as described.

' EBENEZER BLAOKMAN. 

